- web.SecurityHeaders middleware wired into the chi router
- Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' (page scripts are inline); frame-ancestors 'none'
- Referrer-Policy: no-referrer, X-Content-Type-Options: nosniff
- Applied only to text/html responses; JSON API and /raw pass through unchanged
- Regression test internal/web/securityheaders_test.go
- Fix filter fetch to request limit=100 (API max) instead of 500, which
the API silently clamped, so filtered results actually cover the fetch window.
- Document client-side filtering behavior and limits in README Performance Notes.